max32600: fix lp ticker functions - do not inline

Wrong linkage specified, causing build to fail.

Author: 0xc0170

targets/TARGET_Maxim/TARGET_MAX32600/rtc_api.c

@@ -238,20 +238,20 @@ void lp_ticker_fire_interrupt(void)
 }
 
 //******************************************************************************
-inline void lp_ticker_disable_interrupt(void)
+void lp_ticker_disable_interrupt(void)
 {
     MXC_RTCTMR->inten &= ~MXC_F_RTC_INTEN_COMP0;
 }
 
 //******************************************************************************
-inline void lp_ticker_clear_interrupt(void)
+void lp_ticker_clear_interrupt(void)
 {
     MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_ASYNC_CLR_FLAGS;
     MXC_PWRSEQ->flags = MXC_F_PWRSEQ_MSK_FLAGS_RTC_CMPR0;
 }
 
 //******************************************************************************
-inline uint32_t lp_ticker_read(void)
+uint32_t lp_ticker_read(void)
 {
     return rtc_read64();
 }